Astronomy 1210 -- April 4, 2012 (29)
Important Topics from Last Time
- Exam 3 review questions are available. Test is one week from Friday.
- The "constellation of the week" is Gemini - see also
Today's Key Topics
- Why planets have atmospheres
- Evolution of the Earth's atmosphere
- The role of life in altering Earth's atmosphere.
- The cratering history of the Earth
- Large impacts, their frequency and influence on life and civilization
- The odds of substantial harm
- Cataloging potential hazards
- Today: Cosmic Perspective Section 12.4
- The Moon approaches being Full over the next couple of days. Look for it to rise in the East shortly before Sunset.
- Jupiter and Venus are now moving apart. If you've been watching, Venus is almost stationary with respect to the horizon at sunset while Jupiter sinks lower in the west each day heading for conjunction in a couple of months.
- Mars is prominent in the eastern sky in the early evening. Its red color is evident.
- Face Orion in the evening and you will find the stars of Gemini (made evident by the bright pair Castor and Pollux) above Orion.
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